| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | This library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with this library; if not, write to the Free Software |
| 17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | #include "SDL_stdinc.h" |
| 24 | |
| 25 | #include "soundcommon.h" |
| 26 | |
| 27 | void SoundSystemInit(u32 rate,u32 buffersize,u8 channel,u8 format) |
| 28 | { |
| 29 | soundsystem->rate = rate; |
| 30 | |
| 31 | if(format == 8) |
| 32 | soundsystem->buffersize = buffersize; |
| 33 | else if(format == 16) |
| 34 | soundsystem->buffersize = buffersize * sizeof(short); |
| 35 | |
| 36 | soundsystem->mixbuffer = (s8*)SDL_malloc(soundsystem->buffersize); |
| 37 | //soundsystem->soundbuffer = soundsystem->mixbuffer; |
| 38 | soundsystem->format = format; |
| 39 | soundsystem->channel = channel; |
| 40 | soundsystem->prevtimer = 0; |
| 41 | soundsystem->soundcursor = 0; |
| 42 | soundsystem->numsamples = 0; |
| 43 | soundsystem->period = 0x1000000 / rate; |
| 44 | soundsystem->cmd = INIT; |
| 45 | } |
| 46 | |
| 47 | void SoundStartMixer(void) |
| 48 | { |
| 49 | soundsystem->cmd |= MIX; |
| 50 | } |
| 51 | |
| 52 | void SendCommandToArm7(u32 command) |
| 53 | { |
| 54 | while (REG_IPC_FIFO_CR & IPC_FIFO_SEND_FULL); |
| 55 | if (REG_IPC_FIFO_CR & IPC_FIFO_ERROR) |
| 56 | { |
| 57 | REG_IPC_FIFO_CR |= IPC_FIFO_SEND_CLEAR; |
| 58 | } |
| 59 | |
| 60 | REG_IPC_FIFO_TX = command; |
| 61 | } |